Assume the mux$4$ module defined in our code so that we can create

instances of it$.$

module mux$4($input logic d$0,$ d$1,$ d$2,$ d$3,$

input logic $[1$:$0]$ s$,$

output logic y$)$;

$...$

endmodule

Write an $8$:$1$ multiplexer module called mux$8$ with inputs s$[2$:$0],$ d$0,$

d$1,$ d$2,$ d$3,$ d$4,$ d$5,$ d$6,$ d$7$ and output y using instances of mux$4$

$($hint: create a mux$8$ by using instances of mux$4$s similar to how a mux$4$

was created by using instances of mux$2$s$).$

Is this an example of behavioral or structural modeling?